F25B 2500/19
Calculation of parameters
F25B2500/19 (Calculation of parameters) appears on 700 US grants and 874 published applications in this corpus.
Search patents in F25B- Granted patents
- 700
- Published applications
- 874
- Assignees
- 257
- Inventors
- 1,609
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 3 | 4 |
| 2004 | 8 | 14 |
| 2005 | 6 | 26 |
| 2006 | 11 | 39 |
| 2007 | 15 | 30 |
| 2008 | 11 | 18 |
| 2009 | 17 | 32 |
| 2010 | 21 | 17 |
| 2011 | 21 | 18 |
| 2012 | 13 | 26 |
| 2013 | 16 | 24 |
| 2014 | 8 | 37 |
| 2015 | 31 | 46 |
| 2016 | 27 | 31 |
| 2017 | 42 | 68 |
| 2018 | 50 | 72 |
| 2019 | 72 | 52 |
| 2020 | 57 | 47 |
| 2021 | 40 | 50 |
| 2022 | 40 | 62 |
| 2023 | 57 | 47 |
| 2024 | 54 | 58 |
| 2025 | 42 | 40 |
| 2026 | 23 | 16 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Control method, apparatus, and device for compressor, storage medium, and refrigeration system22 Sep 2026US 12,742,578 B2Gd Midea Heating & Ventilating Equipment Co., Ltd.
- CO2 refrigeration system with convertible compressors25 Aug 2026US 12,716,621 B2Hill Phoenix, Inc.
- Refrigeration cycle apparatus and optimization method25 Aug 2026US 12,716,625 B2Mitsubishi Electric Corporation
- Systems and methods for refrigerant leakage diagnosis11 Aug 2026US 12,704,304 B2Tyco Fire & Security GmbH
- Systems and methods for defrost of heat pump systems30 Jun 2026US 12,669,273 B2Goodman Manufacturing Company, L. P.
- Air conditioning system27 Aug 2026US 2026/0251330 A1Carrier Japan Corporation
- Compressor sensor and diagnostics system and method27 Aug 2026US 2026/0251369 A1Tyco Fire & Security GmbH
- Two-stage compression centrifugal unit and middle air supplementing control method therefor, and heating and ventilation device20 Aug 2026US 2026/0243470 A1Chongqing Midea General Refrigeration Equipment Co., Ltd.
- Multi-type refrigeration cycle apparatus23 Jul 2026US 2026/0210606 A1Mitsubishi Electric Corporation
- Control system and refrigeration system23 Jul 2026US 2026/0210608 A1Daikin Industries, Ltd.
Most cited
By later US patents
- Monitoring refrigerant in a refrigeration system192US 7,752,853 B2Emerson Retail Services, Inc. · 2010
- Air filter monitoring system159US 7,244,294 B22007
- Apparatus and method for detecting faults and providing diagnostics in vapor compression cycle equipment156US 6,658,373 B2Field Diagnostic Services, Inc. · 2003
- Intelligent thermostat system for monitoring a refrigerant-cycle apparatus134US 7,331,187 B22008
- Specific coefficient of performance measuring device131US 4,510,576 AHoneywell Inc. · 1985